CEOs use Obama visit to press Russia on rule of law

The summit between Obama and Medvedev is expected to focus on talks on cutting U.S. and Russian nuclear weapons and on helping Washington in Afghanistan.

A breakthrough at these talks would serve as firm evidence that both sides want to "press the reset button" -- to use Washington's phrase -- on U.S.-Russia relations.

(Reporting by Dmitry Zhdannikov; editing by Myra MacDonald)